OpenAI vs 
SpaceXAI
Verdict
- OpenAI's flagship leads: GPT-6 Astra at 71.8 vs Grok 4.6 at 66.0.
- OpenAI has the better model in 4 of 4 price bands.
- SpaceXAI's fastest ranked model (Grok 4.20 Multi-Agent, 304 tok/s) beats OpenAI's (GPT-5.4 Mini, 224 tok/s).
- OpenAI publishes more open-weights models (4 vs 1).
- OpenAI ships more often: one model every 26 days against every 42.
Best model per price band
Each provider’s highest-index model below the price ceiling. Purple marks the winner of the band.
| Price band | OpenAI | SpaceXAI |
|---|---|---|
| Under $0.50/M | GPT-5.6 Luna xhigh 61.1$0.450/M | – |
| Under $2/M | GPT-5.6 Luna xhigh 61.1$0.450/M | Grok 4.20 thinking 59.9$1.56/M |
| Under $10/M | GPT-5.6 Sol max 68.8$8.00/M | Grok 4.6 medium 66.0$3.00/M |
| Any price | GPT-6 Astra max 71.8$20.00/M | Grok 4.6 medium 66.0$3.00/M |
Line-up
| Metric | OpenAI | SpaceXAI |
|---|---|---|
| Flagship index | 71.8 | 66.0 |
| Ranked models | 43 | 16 |
| Open-weights models | 4 | 1 |
| Cheapest ranked, $/M | $0.088 | $1.25 |
| Fastest ranked, tok/s | 224 | 304 |
| Release cadence, days | 26 | 42 |
| Last release | 2 Sept 2026 | 21 Sept 2026 |
| Next expected | 17 Sept 2026 – 8 Oct 2026 | 16 Oct 2026 – 18 Nov 2026 |